1. What are some of the apps made? Even the website doesn't show any link.
2. How do they (himself and his customers) get users for the app they made? I've built android apps, and I'm telling you, making the app is the easy part (even when coding yourself from zero).
Not sure what you mean by "spam" apps, but that's not the case. Nobody is spamming anyone.
Really? I'm sure at least some of these are made using (cr)AppyGEN: https://play.google.com/store/search?q=dog%20simulator&c=app...
Searching an app store is about as effective as seeking medical/dating advice in your spam folder, so I don't bother.
This is HN, not reddit.